A problem in electrical prospection and an ๐-dimensional Borg-Levinson theorem
A problem in electrical prospection and an ๐-dimensional Borg-Levinson theorem
We show that the Dirichlet to Neumann map for <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="minus normal upper Delta u plus upsilon u equals 0"> <mml:semantics> <mml:mrow> <mml:mo>โ<!-- โ --></mml:mo> <mml:mi mathvariant="normal">ฮ<!-- ฮ --></mml:mi> <mml:mi>u</mml:mi> <mml:mo>+</mml:mo> <mml:mi>ฯ
<!-- ฯ
--></mml:mi> <mml:mi>u</mml:mi> <mml:mo>=</mml:mo> <mml:mn>0</mml:mn> </mml:mrow> <mml:annotation encoding="application/x-tex">- \Delta u + \upsilon u = 0</mml:annotation> โฆ